Atmospheric gas burner assembly for improved flame stability

F - Mech Eng,Light,Heat,Weapons – 23 – D

Patent

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Details

F23D 14/06 (2006.01) F23D 14/26 (2006.01) F23D 14/74 (2006.01) F24C 3/08 (2006.01)

Patent

CA 2219238

A gas burner assembly for connection to a gas source includes a burner body having a sidewall and a main gas conduit. The burner body further includes a number of primary burner ports disposed within the sidewall, each for supporting a respective main flame, and a simmer flame port disposed within the sidewall adjacent to the primary burner ports for supporting a simmer flame. Additionally, a main fuel chamber is disposed within the burner body to provide fuel to the primary burner ports, and a stability chamber is disposed within the burner body to channel fuel to the simmer flame port. In one configuration, the stability chamber has one or more stability inlets proximate the burner throat which provide the stability chamber with fuel by utilizing the static pressure associated with each stability inlet. In another configuration, the stability chamber has a small feed hole located proximate the burner throat of the main gas conduit. Each configuration creates a comparatively large pressure drop across the stability chamber during fuel flow due to the positioning of the stability inlets or the feed hole proximate the burner throat, thereby reducing the sensitivity of the simmer flame to pressure disturbances.

Cette invention concerne un brûleur à gaz dont le corps comporte une paroi latérale et une arrivée principale de gaz. Le corps du brûleur comprend un certain nombre d'orifices principaux de combustion ménagés dans sa paroi latérale où brûlent une série de flammes principales et un orifice de flamme-pilote ménagé dans ladite paroi latérale à proximité des orifices principaux de combustion. De plus, une chambre principale d'alimentation des orifices principaux de combustion est ménagée dans le corps du brûleur, ainsi qu'une chambre de stabilisation servant à canaliser le combustible gazeux vers l'orifice de flamme-pilote. Dans une variante, la chambre de stabilisation comporte, à proximité du col du brûleur, un ou plusieurs orifices d'entrée pour son alimentation mettant à profit la pression statique qui règne dans ces orifices. Dans une autre variante, la chambre de stabilisation comporte un petitorifice d'alimentation à proximité du col de l'arrivée principale de gaz. Chaque configuration engendre une chute de pression relativement importante dans la chambre de stabilisation en raison de l'emplacement des orifices d'entrée ou petit orifice d'alimentation à proximité du col du brûleur, chute de pression qui réduit à la sensibilité de la flamme-pilote aux fluctuations de la pression.

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